钢包内衬用耐火材料对钢中非金属夹杂物的影响

Effect of ladle-lining refractory on non-metallic inclusions in steel

炉外精炼是炼钢流程中控制钢中非金属夹杂物的重要转折点,作为整个精炼过程中与钢液实时接触的钢包内衬用耐火材料,因为高温物理化学反应易向钢中引入夹杂物,导致精炼效果达不到预期。通过对典型现役钢包内衬用耐火材料与不同脱氧钢之间的界面反应归纳发现,钢包内衬用耐火材料会对钢中夹杂物的形貌、成分和理化性能产生影响,既可向钢中引入夹杂物,也能够吸附去除夹杂物。提出未来钢包内衬用耐火材料应被赋予更多净化钢液等功能指标的发展方向。

Seconclary refining is an important turning point in the control of nonmetallic inclusions in steel during the steelmaking process.The ladle-lining refractory are always confronted with severe physiochemical reactions during the whole secondary refining process,which leads to the introduction of inclusions in the molten steel and resulting in less than expected refining results.The interface reaction between ladle-lining refractories and the molten steel and introduce the resulting influences on the formation of inclusions was focused,and it was found that the ladle lining refractory material will affect the morphology,composition and physical and chemical properties of the inclusions in the steel.It is possible not only to introduce inclusions into the steel,but also to absorb and remove them.It is proposed that the future refractory materials for ladle lining should be given more development direction for the purification of molten steel and other functional indicators.